269N. With a view to
rectifying any mistake apparent from the record, the competent authority may
amend any order made by him under this Chapter at any time before the time for
presenting an appeal against such order has expired, either on his own motion
or on the mistake being brought to his notice by any person affected by the
order :

Provided that if any such
amendment is likely to affect any person prejudicially, it shall not be made
without giving to such person a reasonable opportunity of being heard.